Radiator-nipple.



J. A. FIELD.

RADIATOR NIPPLE.

APPLICATION FILED NOV. 7, 1907.

Patented Jan, 5, 1909.

UNITED STATES PATENT OFFICE.

JESS-E A. FIELD, :OF DUNKIRK, NEW YORK.

RADIA'EOR-NIPPLE.

n. phases.

11b whomqit may concern: 'Be it known thatl, .Jnssn A. F1ELn, a citigenof the United States, residing at Dunkirk, in .the county of Chautauqua and State .of NewjYork, haveinvented a certain new Improved Radiator-Nipple, of wh h the follo ng i a sp cifi a ion.

This inventionrelates to an improved nipe or con for joining the sections or op s of'ra tors, or-the like, and the object .of invention is toproduce a nip is having a comparatively so t non-corro ible outer surface which when fitted into place will form a per manent non-'leakable joint between radiatorsections, or loops, coupled with means for preventing movement of the soft outer portionrelative to the inner portion of the I p, inpfile as it is forced into the sections.

e invention also relates to certain details in the construction of the improved nip- I ple or coupling which y will be fully and clear ereinafter described and claimed reference beinglhad to the accompanying drawings in WhiC Figure 1 is a central transverse section through two radiator loops connected by my improved nipple. Fig. 2 is a detached side view of the improved nipple. I Fig. 3 is a detached end view of the improved nipple. Fi 4 is a detached side view of the inner anmfius of the improved nipple. Fig. 5 is a de-. tached end view of the Inner annulus of the 1m roved nipple.

ing and fitted rigidly around the inner annu n referring'to the drawings in detail, like numerals designatelikc parts.

The preferred structure of my improved nipple as shown in the accompanying drawings consists of an inner annulus l of hard metal such as cast iron and commonly known 1 in the trade as gray iron and an outer annulus 2 of soft material such as lead, surroundlus. The inner annulus has its outer lperipheral surface oppositely tapered slight y from its center toward both ends as shown at 3 in Fig. 4, and its end edges are tapered more abru tly to form shoulders 4. The outer ann us 2 is preferably lead which is cast around the inner annulus so as to fit tightly around the same, being held rigidly in place thereon by its thicker end portions 5 which seat against the shoulders 4. This provides means for preventing any movement of the outer portion on the inner portion under the pressure or strain of fitting the mpple 1n Specification of Letters Ratent. Application flied November 7, 1907. Serial No. 401,109.

place in radiator sections.

Patented-Tan. 5,

These end portions 5, not onl prevent any movement of the outer annulils upon the inner annulus while the nipple is bemg forced into place in a radiator section or loop but also provide thick portions of coniparativeliy soft metal which are capable of being s iaped to fit snugly in the openings in the radiator when centered therein and thus form a tightnonlea'kable joint.

The outer surface of the inner annulus 1, is preferably roughened to provide a multiplicty of minute depressions and raised portions and the outer annulus when cast upon the inner annulus shrinks thereon with its inner surface in close contact with the outer surface of the inner annulus, and formed with. .a similar roughened surface, thereby rigidly locking the two dissimilar portions of metaltogether.

Sofar as my knowledge extends, radiator slip nipples or couplings are now made only of stee or wrought iron. The great objection to steel ni ples is that they rust or corrode very rapidly under action ofthe heating agent and soon leak, thereby rendering the radiator useless until repaired. To repair a radiator having a leaking joint it is necessary to disconnect and uncouple the section and replace the defective nipple with a new nipple which is rather a laborious and expensive operation. Wrought iron nipples require to be turned into shape which is quite a costly operation and makes the nipples expensive. Often when forced into the openings in the radiator sections wrought iron nipples are crushed, and have to be discarded.

My invention. contemplates a composite nipple which will be strong enough to resist any crushin strain, which is non-corrosive and is capab e of having its outer surface distorted to perfectly conform to the circular wall of the opening in. the radiator section or loop into which the nipple is fitted and thus form an absolutely tight joint.

The radiator loops or sections 6, shownin Fig. 1 as being adapted to be united by this improved nipple or con ling are of the ordinary cast iron type and have hubs 7 provided with openings 8 into which the nipples or 105 couplings are forced assho. I i in said Fig. 1.

[I claim as my invention fn '1. A nipple for joining radiator sectlons composed of a hard inner portionand' a soft outer portion, saidportions being secured 110" against movement relative to each other under fitting pressure.

2. A nipple for joining radiator sections composed of a hard inner portion and a soft 5 outer portion, said nipple being provided with means for securing the outer portion to the inner portion whereby movement of the outer portion independent of the inner portion under fitting pressure is prevented.

3. A tubular slip npple for connecting adjacent sections of ra ators consisting inner annulus of hard metal having its end edges tapered abruptly to form beveled shoulders and an outer annulus of comparatively soft metal around the inner annulus having thick end portions which fit against the beveled shoulders of the inner annulus.

4. In a radiator, the combination with sections thereof having openings, of a tubular slip connection adapted to be forced into the openings in the sections for joining said sections consisting of an inner annulus of hard metal and an outer annulus of comparatively soft metal around the inner annulus, said nipple being provided With means whereby the soft outer annulus is secured to the hard inner annulus against movement relative to of an said inner annulus when the nipple is forced in place in the radiator sections.

5. A tubular slip ni ple for connecting adjacent sections of rad iators consisting of an inner annulus of cast iron and a comparatively thin outer annulus of lead, said nipple being provided with means for securing the lead annulus at its ends to the inner annulus.

6. A tubular slip :Apple for connecting adjacent sections ofr iators consisting of an inner annulus'of. cast iron having its peripheral surface op ositely tapered from its center toward bot ends, audits end edges tapered more-abruptly to form beveled shoulders and an outer annulus of comparatively soft metal cast around theinner annulus and having end portions which fit against the beveled shoulders of the inner annulus whereby movement of the outer annulus relative to the inner annulus is prevented as the nipple is forced into place in the radiator sec-=- tions.

JESSE A. FIELD.

Witnesses:

J. M. CHAPMAN, JI'., JOHN J. MADIGAN. 

